Strong quantum fluctuation of vortices in the new superconductor $Mg{B}_2$

H. H. Wen, S. L. Li, Z. W. Zhao +6

By using transport and magnetic measurement, the upper critical field $H_{c2}(T)$ and the irreversibility line $H_{irr}(T)$ has been determined. A big separation between $H_{c2}(0)…